Click Mail > Options > Server
Fill in your name in the name section
Fill in your e-mail adress in the E-mail address ( Ex. : gopiero@rad.net.id )
Fill in smtp.rad.net.id in Outgoing Mail (SMTP)
Fill in pop.rad.net.id in Incoming Mail (POP3)
Choose Logon using.
Fill in your user name in Account name ( Ex. : gopiero )
Fill in your E-mail password in Password section
Click Advanced setting button
Fill in your e-mail adress in Reply to ( Ex. : gopiero@rad.net.id )
Click Apply button > OK.